Star cluster catalogues for the LEGUS dwarf galaxies
Abstrak
We present the star cluster catalogues for 17 dwarf and irregular galaxies in the HST Treasury Program ‘Legacy ExtraGalactic UV Survey’ (LEGUS). Cluster identification and photometry in this sub-sample are similar to that of the entire LEGUS sample, but special methods were developed to provide robust catalogues with accurate fluxes due to low cluster statistics. The colours and ages are largely consistent for two widely used aperture corrections, but a significant fraction of the clusters are more compact than the average training cluster. However, the ensemble luminosity, mass, and age distributions are consistent suggesting that the systematics between the two methods are less than the random errors. When compared with the clusters from previous dwarf galaxy samples, we find that the LEGUS catalogues are more complete and provide more accurate total fluxes. Combining all clusters into a composite dwarf galaxy, we find that the luminosity and mass functions can be described by a power law with the canonical index of −2 independent of age and global SFR binning. The age distribution declines as a power law, with an index of ≈− 0.80 ± 0.15, independent of cluster mass and global SFR binning. This decline of clusters is dominated by cluster disruption since the combined star formation histories and integrated-light SFRs are both approximately constant over the last few hundred Myr. Finally, we find little evidence for an upper-mass cut-off (<2σ) in the composite cluster mass function, and can rule out a truncation mass below ≈104.5M⊙ but cannot rule out the existence of a truncation at higher masses.
Topik & Kata Kunci
Penulis (124)
D. Cook
J. Lee
A. Adamo
H. Kim
R. Chandar
B. Whitmore
A. Mok
J. Ryon
D. Dale
D. Calzetti
J. Andrews
A. Aloisi
G. Ashworth
S. Bright
T. Brown
C. Christian
M. Cignoni
G. Clayton
R. D. Silva
S. D. Mink
C. Dobbs
B. Elmegreen
D. Elmegreen
A. Evans
M. Fumagalli
J. Gallagher
D. Gouliermis
K. Grasha
E. Grebel
A. Herrero
D. Hunter
E. I. Jensen
K. Johnson
L. Kahre
R. Kennicutt
M. Krumholz
N. Lee
D. Lennon
S. Linden
C. Martin
M. Messa
P. Nair
A. Nota
G. Ostlin
R. Parziale
A. Pellerin
M. Regan
E. Sabbi
E. Sacchi
D. Schaerer
D. Schiminovich
F. Shabani
F. Slane
J. Small
C. L. Smith
L. Smith
S. Taibi
D. Thilker
I. D. L. Torre
M. Tosi
J. Turner
L. Úbeda
S. V. Dyk
R. Walterbos
A. S. O. PhysicsAstronomy
C. I. O. Technology.
Infrared Processing
A. Center
D. Astronomy
The Oskar Klein Centre
S. University
G. Observatory
D. Physics
Astronomy
U. Toledo
Space Telescope Science Institute
U. Wyoming
D. O. Astronomy
U. Massachusetts
S. Observatory
U. Arizona
Institute for Computational Cosmology
C. F. Astronomy
D. Physics
University of Pisa
Louisiana State University
Dept. of AstronomyAstrophysics
University of California at Santa Cruz
Astronomical InstituteAnton Pannekoek''
U. Amsterdam
S. O. Physics
U. Exeter
Ibm Research Division
T. J. W. R. Center
Vassar College
U. Virginia
National Radio Astronomy Observatory
U. Wisconsin--Madison
Zentrum fur Astronomie der Universitat Heidelberg
Institut fuer Astro- und Teilchenphysik Institute for Astronomy
A. Rechen-Institut
Instituto de Astrof'isica de Canarias
D. Astrof́isica
U. L. Laguna
L. Observatory
New Mexico State University
I. O. Astronomy
U. Cambridge
Research School for Astronomy
Astrophysics
Australian National University
E. Centre
Esa
Villanueva de la Cañada
U. Alabama
State University of New York at Geneseo
Observatoire de Geneve
U. Geneva
Columbia University
T. J. H. University
Bologna University
I. D. Astronomía
Universidad Autonoma de Mexico
Unidad Acad'emica en Ensenada
Akses Cepat
- Tahun Terbit
- 2019
- Bahasa
- en
- Total Sitasi
- 37×
- Sumber Database
- Semantic Scholar
- DOI
- 10.1093/mnras/stz331
- Akses
- Open Access ✓